THE MOST SUCCESSFUL ANIMALS, INSECTS, 

 AND THEIR RELATION TO MAN 



PROBLEM XXX 



A study of same animal likenesses and differences, 

 and the classification of insects. 



a. The Grasshopper or Locust (a Straight-winged Insect). 



1. BODY 



Note. This is an optional study if a living grasshopper was studied 

 in Problem IV. 



Observations. 1. Note the regions into which the body is 

 divided. They are called respectively the head, thorax, and 

 abdomen. 



2. To which region are the wings and legs attached ? 



3. Note the outer skeleton (exo skeleton). Is it flexible or 

 hard and unyielding ? It is composed mostly of chit in. 



Conclusion. Show whether an inside or outside skeleton 

 would be best for a locust. Note. Keep in mind their habitat 

 amongst leaves, twigs, grass, etc., and that they can fly quite 

 long distances. 



2. APPENDAGES 



Observations. 1. How many pairs of legs are there ? How 

 do they differ in size ? Where are they located ? 



2. Note that each leg is made up of three principal parts, 

 the femnr or thigh, the tibia or shank, and the tarsus or foot. 



3. Find some hooks and pads on the tarsus. 



4. What is the use of spikes on a runner's shoes ? 

 Conclusions. 1. How do the legs probably differ in use? 



Give reasons from their position and structure. 



2. What is the probable use of the hooks of the tarsus ? 



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